Tube-expander.



PATBNTBD Nov. s, 1903.

C.- F. GARTY.

TUBE EXPANDER. AnLIoATIoN FILED Img. 1a, 1902.

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A lshaped portion d and a threadedtportion d'. l The threaded portion cl passes through the y Fig.` 3 is a cross-sectionon the line 3 3 of Fig.

UNITED Sierras "Patented November :5, leva.

Primeur OFFICE.

CHARLES rAruous onnrrfbr wAsruNe'roN, NORTH oARoLiNA.

i'UfBE-EXPANDER.

srncrrrenrron ronningpart or' Letters" Patent No. 743,146, dated November 3,1903.

Application filed December 13, 14902.

Serial No. 135.038. (No model.)

To 1f/ZZ whom) it may concern: Y Be it known that I, SHA1-inns EABRICUS CARTY, a citizen of the United States, and a resident of Washington,in the county of Beaufort and State of North'Carolina,haveinvent ed a new and Improved Tube-Expander, of which the following is a full, clear, and exact description. I

`This invention relates toa tube-expander, one of the leading features of which isthe corrugation or roughening of the rollers, causing said rollers to make irregular and crossing indentations in the tube, thus facilitating the work of expanding the same.

The invention also relates to certain novel features of construction concerned with the other parts of the tube-expander, which enable theaction of the rollers to be rendered more thoroughly eifective.

This specification is an exact description of one example of my invention, while the claims define the actual scope thereof. i-

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a side elevation of the invention. Fig. 2 is a longitudinal section thereof.

2. Fig. 4 is al cross-section on the line 4 4 of Fig. 2, and Figs. 5 to 10 are views illustrating various forms of roughened or irregular surfaces on'the expanding-rollers.

a indicates the tubular body'of the device, which is formed with a central cavity ct' and three or more cavities a2 for the rollers, these cavities a2 extending radially outward fromthe central cavity ce. The body a has a shoulder a thereon, and againstthis shoulder bears a disk or plateb, carrying the lateral flanges b, which are adapted to inclose the pipe in the usual manner. t

Attached to the inner end of the body a is a tube c, which forms a continuation of the central passage a', and in this passage a and tube c is located the expander-spindle, which comprises an essentially Atriangular wedgeouterendof the body ct and carriesv a nut e,

which has a tubular extension elfitted in a corresponding cavity 0.4 in the body a; and

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formed with anannular groove e2, inwhich is secured a ke-y e4, this key holding the nut to turn freely on the body a, but preventing longitudinal movement of the nut. It is clear that by turning the nut e the spindle dd' may be moved longitudinally in the body a in either. direction desired. The said spindle is kept from rotation by a key f, which is fastened in the body a adjacent to its outer end and bears in either one of two grooves cl2, formed in the threaded 'portion of the Y spindle. Two grooves are provided in order to permit the spindle to be held with its flat faces or its corners against the roller-boxes,

according'to the preference of the user, and to change from one groove to the other the key f should of course be withdrawn, the spindle turned as desired, and then the key moved back.

g indicates the roller-boxes, and h indicates the rollers. The boxes are of essentially rectangular form and have the roller-trunnions h' mounted to turn freelyin the boxes g, so that the outer portions of the peripheries of the rollers will be exposed.

c' indicates pins or catch devices which are held in the body ct and are pressed against the respective roller-boxes g by means of rubber cushions or other form of spring t2. The said boxes g are provided with recesses g in their ends, in which recesses the 4rounded heads of the pins or spring-catches are ada pted to project, thus holding the boxes in place and permitting the movement of the boxes outward under the action of the wedge or tapered portion d of the spindle and also per-- mitting the complete removal of the rollerboxes when it is desired to change the form of the rollers or to place cutters in the cavities a2, thus adapting the device to a tubecutter.

The surfaces of the rollers 7L are corrugated,

roughened, reduced, or made irregular in any other way, so as to cause the rollers when working against the tube to form irregular indentations in the tube, thus making the Work of expanding the tube easier. Figs. 5, 6, 7, and 8 show various forms of regular corrugations. Fig. 9 shows a pitted roller, and Fig. 10 shows a roller with broken corrugations. Itis clear that these effects may be employed indefinitely without departing from the es ICO smooth form.

The manner of using the invention will be apparent to persons skilled in this art, since it does Vnot differ from `the use of tube-expanders as heretofore constructed. this means, however, the work of expanding the tube may bedone much more easily and rapidly than heretofore.

Various changes in the form, proportions, and minor details of my invention may be resorted to at will without departing from the spirit and scope thereof. Hence I consider myself entitled to all such variations as may lie within the intent of my claims.

Having thus described my invention, I claim as new and desire to securebyiLetters Patent- 1. A tubeexpander, comprising a body, a roller mounted to turn freely against the tube and having a roughened surface, a box mounted to move in the body in which box the roller is mounted to turn, and a tapered spindle working against the box to move it.

2. Aitube-expander, comprising a body, a box, a spring-pressed pin engaging the box movably to hold the same, a roller carried by the box, means for moving the box and roller,

Y said spring-pressed pin comprising a pin provided with a rounding head engaging the box, and a cushion'set back of said head and bearing between the same and the body.

3. A tube-expander, comprising a body, av roller mountedthereon, a spindle for operating the roller, means, for moving the spindle, said spindle having. two longitudinal grooves therein, and a key capable of bearing-in either of said grooves.

Haies e. A tube-expandemlhaving a body,` a plurality of rollers mounted. thereon, said rollers being diverselycorrugated so as to form crossing indentations in the tube, for the purpose specified.

5. A tube-expander, comprising a body, a box engaged therewith, an expanding-tool mounted in the box, and a spring-pressed catch mounted in the body and`slidably engaged with the box, for the purpose specified.

6. A tube-expander, comprising a body, a

4box engaged therewith, an expanding-tool carried by the box, said box having a groove in its outer surface, and a springpressed catch bearing in said groove removably to hold the box and to allow it a limited move ment within the extent of said groove.

7. A tube-expander, comprising a body, a

' roller mounted thereon, a tapered spindle for operating the roller, means for moving the spindle longitudinally of the body, and a guide device capable of holding the spindle in either one of `two radial positions without interfering with its longitudinal movement.

8. -A tube-expander, comprising a body, a roller mounted thereon, a tapered spindle for operating the roller, means for moving the spindle longitudinally of the body, a guide device capable of holding the spindle in either of two radial positions without interfering with its longitudinal movement, said device comprising a key on the body, and two keyways in the spindle with either of which said spindle is capable of engaging.`

In testimony whereof I have signed my name to'this specication in the presence of two subscribing witnesses.

CHARLES FABRIOUS CAR'IY. Witnesses:

ROBERT J. MANNING, J. F. THOMAS. 

